I have a 2011 Mac Mini connected to an Akitio Thunderdock (via thunderbolt) that is no longer working. It has been flawless since I got in in early January until last night. All of a sudden I got those warning messages regarding improperly disconnecting drives that you get if you unplug them, or in this case if they somehow become unmounted. I think it is not the dock because the dock works just fine with my Macbook Air. Both the power and thunderbolt (green & blue) lights are lit up on the dock, (as if it is working fine) but the drives do not show up or mount. I have usb3, eSata, and FW800 hooked up through the dock and none of them work. I think it's not the drives either, because they mount just fine when connected to the back of the mini through usb2 or FW800. Obviously I can't test the esata. In About this Mac, more info, system report, thunderbolt it says "no drive connected" Plugged and unplugged everything on the doc, restarted mini multiple times. Haven't tried that reset where you disconnect everything, including the power cord. Nor have I tried booting from a backup clone I have. I'll try those tonight. I also plugged my mini-display to hdmi adapter into the thunderbolt port to see if that worked and it sent out a video signal just fine to my TV. I know this doesn't tell me anything about thunderbolt function, but at least I know the port on the back of my mini isn't fried, Any thoughts??